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3 years ago

10

Select all that justify the following statement.10 + x • 12 = 12x + 10

1 answer:

Hatshy [7]3 years ago

4 0

10 + x*12 = 12x+10

since the left side can be re-written as 12x+10 this does equal the right side

so any real number ( any value of x ) will work

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The half-life of a radioactive kind of antimony is 60 days. If you start with 720 grams of it, how much will be left after 180 d

Marat540 [252]

The answer would be 90 because it takes 60 days to become a half-life so the the half of 720 is 360 the 180 then 90

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3 years ago

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A ship traveled for 4 hours heading east and for 3 hours heading north. If the total distance traveled was 149 miles, and the sh

Alex

D=vt, distance is equal to velocity times time.

4v+3(v+3)=149 perform indicated multiplication

4v+3v+9=149 combine like terms on left side

7v+9=149 subtract 9 from both sides

7v=140 divide both sides by 7

v=20

So the ship traveled at a speed of 20 mph when heading east.

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3 years ago

The areas of the two watch faces have a ratio of 16:25 What is the ratio of the radius of the smaller watch face to the radius o

Leona [35]

Answer:

The ratio of the radius of the smaller watch face to the radius of the larger watch face is 4:5.

Step-by-step explanation:

Let the Area of smaller watch face be $A_1$

Also Let the Area of Larger watch face be $A_2$

Also Let the radius of smaller watch face be $r_1$

Also Let the radius of Larger watch face be $r_2$

Now given:

$\frac{A_1}{A_2} =\frac{16}{25}$

We need to find the ratio of the radius of the smaller watch face to the radius of the larger watch face.

Solution:

Since the watch face is in circular form.

Then we can say that;

Area of the circle is equal 'π' times square of the radius 'r'.

framing in equation form we get;

$A_1 = \pi {r_1}^2$

$A_2 = \pi {r_2}^2$

So we get;

$\frac{A_1}{A_2}= \frac{\pi {r_1}^2}{\pi {r_2}^2}$

Substituting the value we get;

$\frac{16}{25}= \frac{\pi {r_1}^2}{\pi {r_2}^2}$

Now 'π' from numerator and denominator gets cancelled.

$\frac{16}{25}= \frac{{r_1}^2}{{r_2}^2}$

Now Taking square roots on both side we get;

$\sqrt{\frac{16}{25}}= \sqrt{\frac{{r_1}^2}{{r_2}^2}}\\\\\frac{4}{5}= \frac{r_1}{r_2}$

Hence the ratio of the radius of the smaller watch face to the radius of the larger watch face is 4:5.

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3 years ago

How old is abhasra if she was at least 46 years old five years ago

adoni [48]

Answer:

She is at least 51. She could be older.

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3 years ago

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1. A room is 5 m by 3m. What is the area of the room?

IRISSAK [1]

Answer:

15m2 is the answer my friend.....

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3 years ago

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